fix: Fully quality BindableMetadata generated types

src/SourceGenerators/Uno.UI.SourceGenerators/BindableTypeProviders/BindableTypeProvidersGenerationTask.cs

@@ -14,6 +14,8 @@
 using Microsoft.Build.Execution;
 using Uno.UI.SourceGenerators.XamlGenerator;
 using Microsoft.CodeAnalysis.FindSymbols;
+using Microsoft.CodeAnalysis.CSharp;
+using System.Reflection.Metadata.Ecma335;
 
 namespace Uno.UI.SourceGenerators.BindableTypeProviders
 {
@@ -392,7 +394,7 @@ where field.IsStatic
 
 					foreach (var property in properties)
 					{
-						var propertyTypeName = property.Type.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat);
+						var propertyTypeName = GetFullyQualifiedType(property.Type);
 						var propertyName = property.Name;
 
 						if (IsStringIndexer(property))
@@ -493,6 +495,24 @@ where field.IsStatic
 			writer.AppendLine();
 		}
 
+		private object GetFullyQualifiedType(ITypeSymbol type)
+		{
+			if(type is INamedTypeSymbol namedTypeSymbol)
+			{
+				if (namedTypeSymbol.IsGenericType && !namedTypeSymbol.IsNullable())
+				{
+					return SymbolDisplay.ToDisplayString(type, format: new SymbolDisplayFormat(
+						globalNamespaceStyle: SymbolDisplayGlobalNamespaceStyle.Included,
+						typeQualificationStyle: SymbolDisplayTypeQualificationStyle.NameAndContainingTypesAndNamespaces,
+						genericsOptions: SymbolDisplayGenericsOptions.None,
+						miscellaneousOptions: SymbolDisplayMiscellaneousOptions.EscapeKeywordIdentifiers))
+						+ "<" + string.Join(", ", namedTypeSymbol.TypeArguments.Select(GetFullyQualifiedType)) + ">";
+				}
+			}
+
+			return type.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat);
+		}
+
 		private static string ExpandType(INamedTypeSymbol ownerType)
 		{
 			if(ownerType.TypeKind == TypeKind.Error)